Answer: D
Step-by-step explanation: A is not possible because the shape and the way it is drawn is nearly the same as the figure given. The shape of B is different from the given shape. C is a little too flat to be considered symmetrical to the figure. Which leaves only option D.
Hope this helped :D
This sequence is arithmetic, because each number is the last number plus two.
Factors of 121 are; 1,11, and 121. so it would be D.